Valve.



PATENTED OCT. 23, 1906.

W. K. OMIGK.

VALVE.

APPLICATION FILED MAY28,1906.

WITNESSES UNITED sTATEs PATENT OFFICE.

WILLIAM KIEKE OMICK, OF DETROIT, MICHIGAN, ASSIGNOR TO THE MAGANN AIR BRAKE OMPANY, LIMITED, OF TORONTO, CANADA.

VALVE.

Specification of Letters Patent. Application filed May 2 8, 1906. Serial No. 319.146.

Patented Oct. 23, 1906.

To all whom it may concern:

" Be it known that I, WILLIAM KIRKE useful Improvements in Valves, of which the following is a specification.

This invention relates particularly to valves used in chargin the storage-tanks of car air-brake systems firom a source of supply through a connecting-hose; and my obect is to devise a valve in which the cost of repairs will be reduced to a minimum, which may be quickly opened and automatically closed, and by which on closin the pressure remaining in the connectingose is automatically relieved.

With these ob'eots in View my invention consists, essentially, of a valve-bod having three ports thereintwo diametrica ly opposite to one another, leading, respectively, to the supply-pipe and the atmosphere, and one at right angles thereto, leading to the outletpipe, the first two ports being controlled by two valve-disks secured to a common stem and engaging seats outside the valve-body, substantially as hereinafter'more specifical y described and then definitely claimed.

Figure 1 is a side elevation of my improved valve. Fig. 2 is avertical section of the same at right angles to Fig. 1. Fig. 3 is a plan view showing the lower valve-seat. Fig. 4 is a plan view showing the upper valve-seat.

In the drawings like letters of reference indicate corresponding parts in the different figures.

A is the valve-body,provided with diametrically opposite ports B and C and a lateral port D. The lower port C is fitted with an external rubber valve-seat E, provided with an external flange F at its base. G is a supply-pipe which when the valve is in use is connected with a source of suppl of comressed air. This pipe G is screwe into the Ody, as shown, and is shaped to engage the flange F to hold the seat E in position. The up er port B is also provided with an externa rubber valve-seat H, held in position by a metal ring I, secured to. the valve-body by screws or in any other suitable manner.

The port B is intended to communicate with the atmos here, while the'port D is surrounded by a t readed collar J, intended for connection, with the hose or pipe used in charging the storage-tanks of a car with compressed air.

Extending through both ports B and Ois a valve-stem K. This stem fits closely in one of the ports and is thus suitably guided. I prefer that it should be thus fitted in the port B. Shallow grooves or other passage-ways a areformed between the stem and the sides of the port to permit of the passage of air. These grooves are preferably formed in the stem itself. The stem is reduced in diameter where it asses through the port C, so as to permit of a free passage of air from the pi e G to the port D.

L is a valve-disk formed on or secured to the stem Kand adapted to cooperate with the valve-seat E.

The upper end of the valve-stem K is preferably reduced in diameter and threaded. On the threaded end is slipped a valve-disk M, which is held in place by a cap N, screwed on the end of the stem.

It will be seen that the valve-disks are so placed that when one is engaged with its seat the other interior 0 the body through the port which it controls.

The stem is normally maintained in the position shown in Fig. 1 by means of a coilspring 0, which engages a bar P or a suitable projection in the supply-pi e G.

-A lever Q is pivoted on liigs R, formed on the cap N. It is also pivotally connected with a link S, pivoted on its lower end at the lug T, formed on the side of thebody of the va ve The operation of the device is as follows: There being normally a heav pressure within the supply-pipe G, the isk L is firmly pressed to its seat, and the coil-spring 0 18 thus only of service to hold the disk against its seat when there is no pressure in the pipe G, as is the case before the compressor starts running. When it is desired to supply air through the valve for renewing the supply in the storage-tanks of a car, the lever Q is pressed down, referabl with the foot, until the upper va ve-disk engages its seat.

- There is then free communication through the body of the valve from the supply-pipe G through the port D. The disk M being held pressed against its seat prevents escape of air through the grooves a.

ermits of communication with the As these grooves are of small area in cross-seetion, the

- total'air pressure on the upper valve disk is air-pressure vented from the coupling-pipe by two movements. There is also nothing to get out of order in the valve or to Wear with the exception of the rubber seats, and these are (fuickly and easily renewed at any time-at smal expense.

What I claim as my invention is 1. A valve-body provided with an inletport and an outlet-port; a flanged rubber seat one of the disks into contact wit surrounding the inlet-port; a supply-pi e screwed into the body and engaging the flange on the seat; a valve-disk adapted to engage the seat; and a stem carryin the disk and passing through the port and ya vebody, substantia y as described.

2. A valve-body provided with an inletport and an outlet-port; a flanged rubber seat surrounding the inlet-port; a supply-pi e screwed into the body and engaging the flange on the seat; a valve-disk adapted to engage the seat; a stem carrying the disk and passing through the art and valve-body; and a coil-spring tending normallg to press its seat, substantially as described.

Detroit, Michigan, April 24, 1906.

WILLIAM KIRKE OMICK.

In presence of- AnoLPH BARTHEL, J. B. MORRISON. 

